Years ago, I developed my own slides on occasion, but that was always because I had an overnight deadline and couldn't wait for the lab to get it done. So I wasn't concerned as much with economy -- I was concerned more with turn-around time. It appears that now the time factor would be the only reason one would want to DIY E-6 processing. Kodak has discontinued their kit, which was economical, and the Tetenal kit, which also appears to be economical, is apparently not available in the US. So, as far as I can determine, that leaves Freestyle's Arista. And at the way it's priced, unless I buy a gallon of the stuff, the economy just isn't there. And with as expensive as shooting slides has become -- $15 to $20 per roll, including developing -- I wouldn't mind figuring out a way to reduce prices somewhat. According to the Arista data sheet, 1 pint will develop 2 rolls of 35mm, and a quart will develop 4 rolls. I can have two rolls of 35mm E-6 processed same day at a local pro lab, unmounted, for less than the cost of the Arista 1 pint kit, and mounted for about the same price as the kit. But with the kit I have to add in shipping. For the 1 quart kit, it's about break-even with the pro lab, when shipping is factored in. From what I've read, the Arista doesn't keep that long once it's been opened, so if I were to buy a gallon, I'd better have a stockpile of slide film to develop, or else be planning on shooting a bunch of rolls pretty soon thereafter. Right? Or does it keep for a while? Also, the Arista data sheet starts getting rather vague when it discusses extending the use of its developer. It does state that it doesn't recommend more rolls (or sheets) than what is stated, but it goes on to say that the person doing the developing must be the final arbiter. Okay, fine, so for you who have used Arista and stretched it some, how well does it handle this? I mean, if I could develop, say, four rolls of 35mm or 120 during the same session with the 1 pint kit, then that would represent good economy to me. But since they state that the 1 quart kit should be used for four rolls, I wonder if it's even remotely possible to extend things without losing image quality? Any feedback you'd care to provide regarding your experiences developing your own E-6 and extending the chemicals would be appreciated.